腾讯云对象储存cos的配置方法简单说明

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http://examples-1251000004.picsh.myqcloud.com/sample.jpeg?imageView2/1/w/400/h/600/q/85

http://examples-1251000004.picsh.myqcloud.com/sample.jpeg?imageView2/2/w/400/h/600/q/85!

http://examples-1251000004.picsh.myqcloud.com/sample.jpeg?imageView2/3/w/400/format/png

//app.js

const Koa = require('koa')

const multer = require('koa-multer')

const Router = require('koa-router')

const views = require('koa-views')

const path = require('path')

const fs = require('fs')

const COS = require('cos-nodejs-sdk-v5')

const app = new Koa()

//加载模板引擎

app.use(views(path.join(__dirname, 'view'), {

extension: 'ejs'

}))
const router = new Router()

router.get('/', async (ctx, next) => {

let title = 'hello koa2'

await ctx.render('index', {

title

})

})
//文件上传

//配置

var storage = multer.diskStorage({

//文件保存路径

destination: function (req, file, cb) {

cb(null, 'public/uploads/')

},

//修改文件名称

filename: function (req, file, cb) {

var fileFormat = (file.originalname).split("."); //以点分割成数组，数组的最后一项就是后缀名

cb(null, fileFormat[0] + "." + fileFormat[fileFormat.length - 1]);

}

})

//加载配置

var upload = multer({

storage: storage

});
var cos = new COS({

AppId: '1258336067',

SecretId: 'AKID89vfPu7CzhGzVVSnBKFySkvwkLkyAuc6',

SecretKey: 'SgfS1MSK4ZrwnPBhz70e3JLC0ay85nHW',

});
var tengxun_cos = {

Bucket: '564297479-1258336067',

Region: 'ap-hongkong',

}
//路由

router.post('/upload', upload.single('file'), async (ctx, next) => {

// 文件路径

var filePath = ctx.req.file.path

// 文件类型

var temp = ctx.req.file.filename.split('.');

var fileType = temp[temp.length - 1];

var lastName = '.' + fileType;

// 构建图片名

var fileName = temp[0] + lastName;

//文件重命名 修改文件名称，可更改文件的存放路径。

fs.rename(filePath, fileName, (err) => {

if (err) {

console.log('文件写入失败')

} else {

console.log(fileName)

// let pathName = 'file-' + parseInt(1000000 * (Math.random() + 1)) + '/' + fileName // 随机文件夹名以避免同名文件覆盖

var localFile = './' + fileName;

var key = fileName;

// 腾讯云 文件上传

var params = {

Bucket: tengxun_cos.Bucket,

/* 必须 /

Region: tengxun_cos.Region,

/ 必须 /

Key: key,

/ 必须 */

FilePath: localFile

}

cos.sliceUploadFile(params, function (err, data) {

if (err) {

ctx.body = {

status: '0',

msg: '上传失败',

error: JSON.stringify(err)

}

} else {

var imageSrc = https://564297479-1258336067.cos.ap-hongkong.myqcloud.com/${data.Key}

ctx.body = {

status: '1',

msg: '上传成功',

imageUrl: imageSrc

}

console.log('上传成功')

}

})

}

})
})
app.use(router.routes(), router.allowedMethods())

app.listen(5555, () => {

console.log('Server is running at port 5555...')

})

//server.js

//node.js 作为服务器端

var express = require('express'); //引入框架

var app = express();
//静态资源站

app.use(express.static('public'));
//__dirname 表示当前的文件目录下, 这个server.js文件在哪就代表在那个路径

app.get('/index.html', function (req, res) {

res.sendFile(__dirname + '/' + 'index.html'); //注意dirname这个变量前面有两个下划线

});
app.get('/process_get', function (req, res) {

//输出json格式

var response = {

'xuhengfeng1': req.query.first_name,

'xuhengfeng2': req.query.last_name

};

console.log(response);

res.end(JSON.stringify(response));

})
var fs = require('fs');

var COS = require('cos-nodejs-sdk-v5');
var cos = new COS({

AppId: '1258336067',

SecretId: 'AKID89vfPu7CzhGzVVSnBKFySkvwkLkyAuc6',

SecretKey: 'SgfS1MSK4ZrwnPBhz70e3JLC0ay85nHW',

});
var tengxun_cos = {

Bucket: '564297479-1258336067',

Region: 'ap-hongkong',

}

var multer = require('multer')

var upload = multer({

dest: './tmp/'

})

// 图片上传

app.all('/api/tengxun/upload2', upload.single('file'), function (req, res, next) {

// 文件路径

var filePath = './' + req.file.path;

// 文件类型

var temp = req.file.originalname.split('.');

var fileType = temp[temp.length - 1];

var lastName = '.' + fileType;
// 构建图片名
var fileName = Date.now() + lastName;
// 图片重命名
fs.rename(filePath, fileName, (err) => {
    if (err) {
        res.end(JSON.stringify({
            status: '102',
            msg: '文件写入失败'
        }));
    } else {
        var localFile = './' + fileName;
        var key = fileName;

        // 腾讯云 文件上传
        var params = {
            Bucket: tengxun_cos.Bucket,
            /* 必须 */
            Region: tengxun_cos.Region,
            /* 必须 */
            Key: key,
            /* 必须 */
            FilePath: localFile,
            /* 必须 */
        }
        cos.sliceUploadFile(params, function (err, data) {
            if (err) {
                fs.unlinkSync(localFile);
                res.end(JSON.stringify({
                    status: '101',
                    msg: '上传失败',
                    error: JSON.stringify(err)
                }));
            } else {
                fs.unlinkSync(localFile);
                var imageSrc = 'https://564297479-1258336067.cos.ap-hongkong.myqcloud.com/' + data.Key;
                res.end(JSON.stringify({
                    status: '100',
                    msg: '上传成功',
                    imageUrl: imageSrc
                }));
            }
        });
    }
});

})
var server = app.listen(3000, function () {

var host = server.address().address;

var port = server.address().port;

console.log('应用实例,访问地址为http://%s', host, port);

})